"Stanley Cups and Lead Poisoning: The Truth Behind the Viral Claims"
Stanley cups contain lead in the form of a pellet used to seal the vacuum insulation, posing a risk only if the cover at the bottom comes off and exposes the lead. Lead exposure can occur through touching the lead and then touching the mouth or nose. Experts emphasize the dangers of lead poisoning, especially for children, and recommend monitoring the cup for any damage. Other companies also use similar lead-containing pellets in their insulated tumblers, and consumers are encouraged to report any lead-related concerns to the CPSC.